President Donald Trump abruptly cut short his weekend at Camp David and is returning to the White House for reasons that remain “unclear,” multiple journalists reported Saturday evening, sparking fears the sudden change could signal an impending "major escalation" in the Middle East.

Trump’s schedule change came shortly after the U.S. Embassy in Israel issued a security alert instructing Americans in the Middle East to “exercise heightened vigilance and be aware of potential flight cancellations, airspace closures, and travel disruptions.” Also on Saturday, Israeli news network i24NEWS reported that Israeli Prime Minister Benjamin Netanyahu cut his scheduled U.S. visit short.

“There’s a TON of very obvious signaling taking place right now for imminent massive escalation against Iran. President Trump, just after Camp David, is returning early to the White House. Bibi Netanyahu is cutting his U.S. Tour a day early, cancelling the Texas leg, and flying directly back to Tel Aviv from New York,” warned geopolitical expert Brett Erickson on Saturday.

“All Middle East US embassies have issued STEP alert warning to Americans in the region. This could certainly be a legitimate escalation… but this is a LOT of very public signaling that is textbook TACO Trump. That said… if it’s not, we’re looking at a MAJOR escalation inbound.”

Sophie Mokoena, a veteran South African journalist, came to a similar conclusion, warning of an “imminent attack.”